Phonograph-record.



JONAS .w.' AYLSWORTH, OF EAsT ORANGE, NEW JERSEY, ss' GNOR, BY MESNE AS -Z SIGNMENTS, TO THOMAS A. EDISON, INCORPORATED, {OF WEST ORANGE, NEW

, 'JERsEY, A CORPORATION OF NEW JERSEY.

Original application filed May 31, 1906, Serial To all whom it may concern:

Be it known that 1,, Jonas W. AyrswoRTH, a citizen of the United States, residing in East Orange, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Phono-- graph-Records, of which the following is a description.

This application is a divisionof Patent No. 855,606 granted June 4,1907.

IMy invention relates to improved duplicatephonograph-records, which can be manthe-present invention is a composite cylindri'cal' str'ucture having an Outer layer of a tough,-- smooth, amorphous. material, 1n which the record-surface is formed and from which a smooth and brilliant reproduction can be obtained, and amain body or support --therefor composed of a very cheap and tough material unsuitable itself for receiving a record surface, the two layers being :well known in the art. This mold isprowelded together' so as to constitute practi (tally a"'si-ngle*homogeneous structure, as I will more fullyh'ereinafter describe and claim.

The material 1n a molten state or in solid-v or pOwderedfOrm-is introduced into a rapidly rotating mold, as I describe in patents numbered 855,605, 855,553 and855,554t, all granted on June 4, 1907, the iouter' layer being. first formed by the-centrifugal fo'rce. developed and,rwhen the material thereof. is,suffic entlyset but, preferably while still slightly plastic,the material to constitute the-inner or main layer is introduced so as to be in timatelyhwelded to the uter layer. The proce ss ,also contemplates the carrying on of Operations bywhich the interior of the rec 0rd may be,sufitably developed to fitthe supportiiigmandrels of talking machinesofw or condition the material is introduced the phonograph type, although if an ex improved process is one in which the @JFFTQE PHO OGRArE-RECORD.

Specification of Letters Patent. Patented Aug. 2Q, 1912:

N 319,422. Divided and this applicatio 1 filed April 1907. SerialjNo. 366,247. i

I panding mandrel-is employed as disclosed in the Patent No. 055,604 granted June st, 1907, of Aylsworth and Dyer, no separatefinishing operation is necessary, since when the records are removed from the molds after being chilled therein, they will, as an inherent result of the recess, be formed with perfectly smooth {cylindrical boresl.

The apparatus used in the above process is essentially 'Ofthe' type-disclosed in my Patent No. 855,605, above referred to, ex cept that I make use of supplementary mechanism for finishing the bores of the records, when this is desirable; I In Order that the intention may be better understood, attention is-directed to the ac-' companying drawings, forming part of this specification,' in which? i c Figure l is a longitudinal sectional View of the improved duplicate phonograph record, Fig. 2, asimi'lar view: of the rotating thereon. I

' In both of the views'corresponding parts i are represented by the-same numerals ot reference.

The mold is of tubularform, carrying on its bore the representation in relief of the record to be duplicated and is produced in any suitable and convenient way, preferably by a processof vacuous deposit, as is vided with a stationary end flange 2, carrying the usual engraved matter for identitying the record, and with a removable end flange 3, adapted to be secured in place inany suitable way. YVhile th'e record is be- ]ing formed in the mold, the latter is rotated so as to cause thematerial to be-u-ni formly distributed over the record surface I by reason of the centrifugal force' developed, This may be accomplished any suitable mechanism such as that shown in Patent No.

855,606, above referred to..-

In the process described in the patent above referred to, material may be intro; duced within the mold in various states, and the mold treated in various ways, as described in the said atent, the result being in'eaoh case to pro( uce the product herein described and claimed. In whatever Way within the mold, as described in the said patent, the mold is rotated at the necessary caused to set or harden by means there described. \Vhen the material of the layer 10 has been thus set, and preferably, while still slightly plastic and sticky, thematerial for the inner layer or body 13 of the record is introduced, the mold being still rotated, whereby the material will distribute itself uniformly over and with respect to the surfacing layer 10, and be intimatelywelded and associated therewith, so as -to form prac tically a continuous structure, Thewe'ld or joint thus formed is autogenou's, the composite product formed by a union of this character being different from one in which an intermediate layer of cement material is employed, as in the latter case, the cement or solution employed penetrates within and perm eates the composition to a certain extent. Unless the melting point of the surfacing layer 10 is considerably higher than the melting point of the material comprising the body 13, it will not be practicable to introduce the material for the latter layer in solid form, since it is important that after the surfacing layer has been pro-perly distributed it should retain its solidified condition. Therefore, I introduce a material for the inner layer in the molten state and continue the rotation of the mold untilthe material has set sufficiently to retain its cylindrical form, as described in my ,Patent No. 855,606 above referred to. Therecord may be finished as described in this patent. Many materials, suitable for the formation of at least the inner portion of duplicate sound records, are so viscid and sticky when molten or in a plastic condition that any attempt to cut them in that state in the finishing of the record would be impossible.

A method is described in my Patent No.

855,606 above referred to, however, by which material is displaced by meansof a records composed of extremely viscid materials can be effectively finished. Accordingly, it is possible to use as a material for the inner layer of my --record a material which is sticky or viscid when molten and As I have already indicated, the surfacing layer 10 of the record should be composed of a hard and extremely smooth material, so as to resist wear of the reproducer stylus, and eliminate scratching noises as much as possible. This surfacing layer may be made quite thin, so that a relatively expensive material for the same can be effectively used. An example of a suitable'composition from which the surfacing layer may be formed is the special transparent composition described in my Patent No. 676,111dated June 11th, 1910.

A suitable example of material from formed, and which while being extremely proximately'the same. coetficient of expansion as the material above referred to, is the following: asphalt 80 parts, stearin pitch 20 parts. In the make up of thiscomposition the ingredients are melted and intimately mixed. v y

Havin now described my invention,

Letters Patent is as follows:

1. An improved duplicate sound'record, comprising a surfacing layer of a very smooth amorphous material carrying the record impression, and an interior layer intimately welded thereto and formed of a mixture of asphalt and, stearin pitch, substantially as set forth.

2. An improved duplicate cylindrical of a very smooth amorphous material carry- :ing the recordimpression, and an interior layer intimately welded thereto and formed 1 of a mixture or asphalt and stearin pitch in which the asphalt greatly'predominates, substantially as set forth. l

This specification signed and witnessed this 3rd day ofApril 1907;

m Witnesses: FRANK D. LEWIS,

, ANNA R. KLEHM.

which, the inner or body layer may be cheap is at the same time tough and of apsound record, com-prising a surfacing layer rotatable mandrel, whereby the bo-resiof which cannot, therefore, be effectively cut.

what I claim as new and desire to secure by Y cylindrical It is hereby certified that in Letters Patent No. 1,036,415, granted August 20, 1912, upon the application of Jonas W. Aylsworth, of East Orange, New Jersey, for an improvement in Phonograph-Records, errors appear in the printed specification requiring correction as follows: Page 2, line 75, for the date, June 11th, 1910 read June 11th, 1901; and same page, line 101, for the word or read of; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 17th day of September, A. D., 1912.

may c. o. BILLINGS,

Acting Gammissioner of Patents, 

